How do underground bases in the ocean keep water from entering when someone enters or leaves?
In: Engineering
Even submarines do this. 2 doors. You open one. Fill the space with water. Close the first and open the second. This a works for all places that regulate pressure. Such as airlocks in space stations.
From Wikipedia:
“An airlock may also be used underwater to allow passage between an air environment in a pressure vessel and the water environment outside, in which case the airlock can contain air or water. This is called a floodable airlock or an underwater airlock, and is used to prevent water from entering a submersible vessel or an underwater habitat.”
Source: https://en.m.wikipedia.org/wiki/Airlock
If you put the “door” in the floor, it would be possible to keep the water out with just air pressure. That way you could leave the door open all the time and enter or leave as you wish. Water will only enter such a base because of gravity or a higher pressure in the water vs the base. Having the door at the bottom fixes the gravity issue as things rarely fall up. If you keep the air pressure inside the station very high then that can stop the other reason water would find its way in.
What underground bases in the ocean are you referring to?
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